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QP Series
2 Stage Compressors
Instruction Manual
This manual contains important safety information and must be
carefully read in its entirety and understood prior to installation
by all personnel who install, operate and/or maintain this product.
On-line product registration, parts ordering and warranty information is available at www.quincycompressor.com
Manual No. 2022201802
July 2014 Edition
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Contents
SECTION 1 SAFETY
Safety First ............................................................................................................................................................2
Summary of Changes ............................................................................................................................................4
SECTION 2 SYSTEM DYNAMICS
Description & Application ....................................................................................................................................5
Principles of Compression Cycles .........................................................................................................................5
Principles of Lubrication Systems .......................................................................................................................5
Principles of Cooling Systems ..............................................................................................................................5
Principles of Dryers & Filters ..............................................................................................................................5
SECTION 3 INSTALLATION
Receiving Delivery ................................................................................................................................................7
Freight Damage ....................................................................................................................................................7
Location .................................................................................................................................................................8
Electrical Supply Requirements...........................................................................................................................9
Wiring & Piping Schematics ..............................................................................................................................10
Mounting .............................................................................................................................................................17
System Components ............................................................................................................................................17
Induction System ................................................................................................................................................19
Compressed Air Discharge System ....................................................................................................................20
SECTION 4 START-UP & OPERATION
Pre-Starting Checklist ........................................................................................................................................24
Initial Starting & Operating ..............................................................................................................................25
Daily Starting Checklist .....................................................................................................................................26
SECTION 5 MAINTENANCE & LUBRICATION
Stopping for Maintenance ..................................................................................................................................27
Maintenance Schedule ........................................................................................................................................27
Lubrication ..........................................................................................................................................................29
Lubricant Filter ...................................................................................................................................................30
Pulley / Sheave Alignment & Belt Tension ........................................................................................................30
Pressure Switch Adjustment .............................................................................................................................. 31
Pilot Valve Adjustment Instructions .................................................................................................................. 33
SECTION 6 TROUBLESHOOTING
Troubleshooting ..................................................................................................................................................34
SECTION 7 REFERENCE INFORMATION
Decal Locations ...................................................................................................................................................38
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SECTION 1 SAFETY
Safety First
At Quincy Compressor safety is not only a primary concern, but a faithfully
performed practice. Beginning with the design stage, safety is built into every
Quincy compressor. It is the inten tion of this manual to pass along the “safety
first” concept to you by providing safety precautions throughout its pages.
“DANGER !”, “WARNING !”, and “CAUTION !” are displayed in large
bold capital letters in the left hand column to call attention to areas of vital
concern. They represent different degrees of hazard seriousness, as stated
below. The safety precaution is spelled out in bold upper and lower case letters
in the right hand column.
DANGER !
WARNING !
CAUTION !
Immediate hazards which will result in severe personal injury or
death.
Hazards or unsafe practices that could result in personal injury or
death.
Hazards or unsafe practices which could result in minor personal
injury, product or property damage.
Each section of this instruction manual, as well as any instruc tions supplied
by manufacturers of supporting equipment, should be read and understood
prior to starting the compressor. If there are any questions regarding any part
of the instructions, please call your local Quincy distributor, or the Quincy
Compressor factory before creating a potentially hazardous situa tion. Life,
limb, or equipment could be saved with a simple phone call.
Compressors are precision high speed mechanical equipment requiring
caution in operation to minimize hazard to property and personnel. There
are many obvious safety rules that must be ob served in the operation of this
type of equipment. Listed below are some additional safety precautions that
must be observed.
•Transfer of toxic, dangerous, ammable or explosive substances using Quincy
Compressor products is at the user’s risk.
•All installation maintenance and repair must be performed by a qualied
technician and/or electrician.
•Turn off and lockout/tagout (per OSHA regulation 1910.147) the main power
disconnect switch before attempting to work or perform any maintenance.
•Do not attempt to service any part of the unit while it is operating.
•Per OSHA regulation 1910.147, relieve the system of all pressure before at-
tempting to service any part of the unit.
•Allow ample time for the compressor to cool before performing service pro-
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cedures. Some surface temperatures exceed 350°F when the compressor is
operating.
•Do not operate the unit with any of its safety guards, shields, screens, enclosure panels or doors removed.
•Do not remove or paint over any DANGER!, WARNING!, CAUTION!, or
instructional materials attached to the compressor. Lack of information regarding hazardous conditions can cause property damage or personal injury.
•Periodically check all pressure relief valves for proper operation.
•Do not change the pressure setting of the pressure relief valve, re strict the
function of the pressure relief valve, or replace the pressure relief valve with
a plug.
•Do not install a shutoff valve in the compressor discharge line with out rst
installing a pressure relief valve of proper size and design between the shutoff
valve and the compressor.
•All components of the compressed air system must be properly rated for the
application.
•Alterations must not be made to this compressor without Quincy Compressor’s approval.
DANGER !
•Be sure that all tools, shipping and installation debris have been re moved
from the compressor and installation site prior to starting the compressor.
•Do not operate the compressor in excess of the ASME pressure vessel rating
for the receiver or the service rating of the compressor, whichever is lower.
•Make a general overall inspection of the unit daily and correct any unsafe
situations. All fasteners must be kept tight.
•Reckless behaviour of any kind involving compressed air is dangerous and
can cause very serious injury to the participants.
•Wear safety glasses and hearing protection during operation, service and
maintenance procedures.
•Provisions should be made to have the instruction manual readily available
to the operator and maintenance personnel. If for any reason any part of the
manual becomes illegible or the manual is lost, have it replaced immediately.
The instruction manual should be read periodically to refresh one’s memory.
It may prevent a seri ous or fatal accident.
•Never use a ammable or toxic solvent for cleaning the air lter or any parts.
Air used for breathing or food processing must meet OSHA 29 CFR
1910.134 or FDA 21 CFR 178.3570 regulations. Failure to do so may
cause severe injury or death.
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WARNING !
Oil and moisture residue must be drained from the air receiver
daily or after each use. Accumulations of oil residue in the receiver
can be ignited by embers of carbon created by the heat of compression, causing an explosion, damage to property and injury to personnel.
CAUTION !
Summary of Changes to This Manual
When using battery cables to start engine driven units do not use
more than a total of 40 ft. of #4 gauge cable (GND & HOT).
The owner, lessor or operator of any compressor unit manu factured by
Quincy Compressor is hereby warned that failure to ob serve the safety precautions and procedures outlined in this manual may result in serious personal
injury, damage to property, and may void your warranty. Quincy Compressor
must authorize all warranty service. Before contacting your distributor or the
factory, check the maintenance requirements and the troubleshooting guide
for your compressor. Most warranty issues can be resolved by following proper
maintenance procedures.
Quincy Compressor neither states as fact, nor in any way implies that the
above list of safety precautions is an all inclusive list, the observance of which
will prevent all damage to property or injury to personnel.
Every effort has been taken to ensure that complete and correct instructions
have been included in this manual. However, possible product updates and
changes may have occurred since this printing. Quincy Compressor reserves
the right to change specifications with out incurring any obligation for equipment previously or subse quently sold.
(since previous printing dated January 2013):
· Clarified safety statement relative to properly rated components for the
compressed air system.
· Updated lubricant capacity specications as result of bearing carrier
redesign.
· Added Lubricant Filter information.
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SECTION 2 SYSTEM DYNAMICS
Description & Application
Quincy Compressor QP Series compressors are heavy duty, air cooled, belt
driven compressors. The QP Series compressors are pressure lubricated and
capable of delivering 175 PSIG of compressed air.
Principles of Compression Cycles
Two Stage Compressors
During the downstroke of the piston of a two stage compressor, air is drawn
through an intake valve in the head of the compressor into the low pressure
cylinder and compressed during the upstroke of the piston.
The compressed air is then released through a discharge valve in the head
of the compressor to an intercooler (usually nned tub ing) where the heat
resulting from compression is allowed to dissipate. The cooler compressed air
is then drawn into a second compression cylinder, the high pressure cylinder,
for compression to final pressure.
From there the compressed air is released through a discharge valve to an
air receiver tank or directly to a network of compressed air supply lines. In
one revolution of the crankshaft a compression cycle is completed.
Principles of Lubrication Systems
Pressure Lubricated Compressors (QP Series)
Moving parts within the crankcase are supplied with lubrication by a positive
displacement, gerotor type oil pump. Oil is drawn up from the bottom of the
crankcase to the oil pump through an oil sump strainer screen. The oil is then
forced under pressure through the oil filter. Oil travels under pressure through
drilled journals in the crankshaft and connecting rods to lubricate crankshaft
bear ings, connecting rod journals, wrist pin bearings and the cylinder walls.
Principles of Cooling Systems
QP compressors are equipped with a compressor sheave with fan blades.
These fan blades force ambient air across cylinder head and intercooler fins
to cool the compressor. These compressors are designed to be operated with
the compressor sheave turning in a counterclockwise rotation (as viewed
“tummy to the sheave”).
Principles of Dryers & Filters
Moisture occurs naturally in air lines as a result of compression. Moisture
vapor in ambient air is concentrated when pressurized and condenses when
cooled in downstream air piping. Compressed air dryers reduce the moisture
vapor concentration and prevent water formation in compressed air lines.
Dryers are a recommended companion to filters, aftercoolers, and automatic
drains for improving the productivity of compressed air systems.
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Page 8
Water and moisture vapor removal increases the efficiency of air operated
equipment, reduces contamination and rusting, increases the service life of
pneumatic equipment and tools, prevents air line freeze-ups, and reduces
product rejects.
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Page 9
SECTION 3 INSTALLATION
Receiving Delivery
Immediately upon receipt of compressor equipment and prior to completely
uncrating, the following steps should be taken:
Step 1) Inspect compressor equipment for damage that may have occurred
during shipment. If any damage is found, de mand an inspection
from the carrier. Ask the carrier how to file a claim for shipping
damages. (Refer to SECTION 3, Freight Damage for complete
details.) Shipping damage is not covered by Quincy Com-
pressor warranty.
Step 2) Insure that adequate lifting equipment is available for moving
the compressor equipment.
Improper lifting can result in component or system damage, or
WARNING !
personal injury. Follow good shop practices and safety procedures
when moving the unit.
Step 3) Read the compressor nameplate to verify the model and size or-
dered.
Step 4) Read the motor nameplate to verify that the volt, phase and hertz
Step 5) Read the pressure relief valve nameplate to be sure it does not
Step 6) Read and understand the safety precautions contained
Freight Damage
It is extremely important that you examine every carton and crate as soon as
you receive it. If there is any obvious damage to the shipping container, have
the delivering carrier sign the freight bill, noting the apparent damage, and
request a damage report.
ratings are the same as the electrical power supply connecting to
the motor. NOTE: Do not use a triple voltage (115/208-230)
single-phase motor or (208-230/460) 3-phase motor for 208
volts or lower. Use a 200 volt or 208 volt motor only.
exceed the working pressure shown on the compressor or any other
component in the system.
within this manual. The successful and efficient operation of
compressor equipment depends largely upon the amount of care
taken to install and maintain the equipment. Quincy Compressor
strongly recommends that any or all person(s) in charge of installing, maintaining, or servic ing one of our compressors read and
understand the entire contents of this manual in order to perform
such duties safely and efficiently.
If concealed damage is discovered at a later date, the carrier must
be notified within 15 days of initial receipt of freight. Concealed ship-
ping damage is not covered by Quincy Compressor Warranty. Contact
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Page 10
the carrier as soon as possible, giving them an opportunity to inspect the shipment at the premises where the delivery was made. Do not move the damaged
freight from the premises where the original delivery was made. Retain all
containers and packing for inspection by the carrier.
A claim form can be requested from the carrier: Standard Form for Pre-
sentation of Loss and Damage Claims (form # 3208). Your claim will need to
be substantiated with the following documents:
a.) form #3208
b.) original bill of lading
c.) original paid freight bill
d.) original invoice or certied copy
e.) other particulars obtainable in proof of loss or damage (photos, dam-
age inspection, etc.)
The proper description and classication of our product in the National
Motor Freight Classication 100-H, contained in item 118100, reads as fol-
lows: Compressors, air, or air ends: with or without air tanks, hose or nozzles,
mounted or not mounted.”
We suggest that these instructions be circulated to your shipping and
receiving personnel.
Location
CAUTION !
QP Series air compressors must be installed and operated in a secure, level,
upright position in an area that is clean, dry, well lighted, adequately ventilated,
and not less than 24 inches to a wall or other compressor. (Note: A gas engine
will produce carbon monoxide; always provide adequate ventilation!) Inspection and mainte nance checks are required daily. Therefore, sufficient space
needs to be provided around the compressor for safe and proper in spection,
cleaning, and maintenance.
Ample circu la tion of air must be provided across the compressor cylinders,
heads and cooler (if so equipped). If at all possible, the pulley drive system
(i.e. motor pul ley, compressor sheave, belts and guard) should face a wall to
minimize any danger created by the drive system while the compressor is
operating. Do not allow hot air from additional equipment to blow towards
the compressor.
QP series compressors should be operated in temperatures under 104°F. In
cold cli mates, the compressor should be installed in a heated building.
Do not operate this compressor in ambient temperatures lower
than 0°F. A crankcase heater is recommended for a compressor that
is to operate in temperatures under 32° F.
Under no circumstances should a compressor be used in an area
WARNING !
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that may be exposed to toxic, volatile, or corrosive atmo sphere. Do
not store toxic, volatile, or corrosive agents near the compressor.
Page 11
Noise
Noise is a potential health hazard that must be considered. There are federal
and local laws governing acceptable noise levels. Check with local officials for
specifications.
Excessive noise can be effectively reduced through various meth ods. Total
enclosures, intake silencers, bafe walls, relocating or iso lating the compressor
can reduce noise levels. Care must be taken when constructing total enclosures
or bafe walls. If not properly constructed or positioned, they could contribute
to unacceptable noise levels or over heating. Consult your local Quincy distributor if assis tance is required.
WARNING !
Electrical Supply Requirements
DANGER !
Unusual noise or vibration indicates a problem. Do not operate the
compressor until the source has been identified and corrected.
The electrical installation of this unit must be performed by a qualified electri-
cian in accordance with the National Electrical Code (NEC) or the Canadian
Electrical Code (CEC), the National Electrical Safety Code (NESC), OSHA
and/or state and local codes. Failure to abide by the national, state and local
codes may result in physical harm and/or property damage.
Before installation, the electrical supply must be checked for adequate
wire size and transformer capacity. Verify that the electrical supply voltage
matches the requirements of the motor. A suitable circuit breaker or fused
disconnect switch should be provided. When a 3 phase motor is used to drive
a compressor, any unreasonable voltage imbalance between the legs must be
eliminated and any high or low voltage corrected to prevent excessive current
draw. Note: This unit must be grounded.
High voltage may cause personal injury or death. Disconnect and
lockout/tagout per OSHA regulation 1910.147 all electrical power
supplies before opening the electrical enclosure or servic ing.
Never assume a compressor is safe to work on just because it is not
WARNING !
WARNING !
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operating. It could restart at any time. Follow all safety precautions outlined in SECTION 5, Stopping For Maintenance.
Electrical enclosures and components must be in compliance with
NEMA environmental ratings for the areas in which they are being
installed.
Overload Relay
An overload relay monitors the compressor motor electrical current and turns
the compressor motor off when an overload is sensed. It is mounted on the
bottom of the motor starter. The overload relay is designed for motors with a
1.15 service factor. The overload relay setting should be adjusted to the motor nameplate amp rating. If the motor has a service factor rating other than
1.15, the overload relay setting must be adjusted to compensate. Contact your
Quincy distributor for assistance.
Page 12
Connect incoming power lines
at screw terminals L1, L2 & L3.
Magnetic Starter
the unit.
CAUTION !
and fasteners are torqued
Verify all wires are secure
before connecting power to
Contactor
Relay
Overload
Fig. 3-1
Wiring Schematic WP1744A (Rev. D)
All wires are red unless otherwise specied.
Dashed lines represent wires supplied by others.
At Installation, the customer is to provide:
Disconnect and branch circuit overcurrent protection and grounding
between the power supply and the electrical control enclosure in accor-
dance with the National Electrical Code (NEC), the Canadian Electrical
Code (CEC) and / or any local codes having precedence.
3 Phase Magnetic Motor Starter With Automatic Start / Stop Control
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Page 13
at screw terminals L1 & L2.
Connect incoming power lines
Magnetic Starter
Contactor
the unit.
CAUTION !
and fasteners are torqued
Verify all wires are secure
before connecting power to
Relay
Overload
Fig. 3-2
Wiring Schematic WP1744B (Rev. D)
All wires are red unless otherwise specied.
Dashed lines represent wires supplied by others.
At Installation, the customer is to provide:
Disconnect and branch circuit overcurrent protection and grounding
between the power supply and the electrical control enclosure in accor-
dance with the National Electrical Code (NEC), the Canadian Electrical
Single Phase Magnetic Motor Starter With Automatic Start / Stop Control
Code (CEC) and / or any local codes having precedence.
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Pressure Switch
To Remove the Cover:
1. Turn the switch handle to “OFF” position.
To Re-install the Cover:
position (as shown).
switch.
2. Remove small screws on side of the cover.
3. Pull the cover away from the pressure switch.
1. Make sure the switch handle is in the “OFF”
2. Carefully slide the cover over the pressure
at screw terminals L1 & L2.
Connect incoming power lines
CAUTION !
and fasteners are torqued
Verify all wires are secure
before connecting power to
DO NOT FORCE!
3. Re-install the small cover screws and tighten.
the unit.
Fig. 3-3
Wired to Motor
Connection Diagram
Single Phase Combination Pressure Switch / Overload Relay
At Installation, the customer is to provide:
Branch circuit overcurrent protection and grounding between the power supply
and the pressure switch in accordance with the National Electrical Code (NEC),
the Canadian Electrical Code (CEC) and / or any local codes having precedence.
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Fig. 3-4
Start / Stop Control
Piping Schematic WP1781B
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Fig. 3-5
Continuous Run - Load / Unload Control
Piping Schematic WP1781C
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Fig. 3-6
Dual Control with Pilot Valve Unloading
Piping Schematic WP1781A
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Fig. 3-7
Dual Control with Solenoid Valve Unloading
Piping Schematic WP1781
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HORIZONTAL TANK UNITS
ANCHORED
VERTICAL TANK UNITS
ANCHORED
HORIZONTAL TANK UNITS
UNANCHORED
1/2” locknut
1/2” at washer
tank foot
isolator backing plate
1/2” x 2” bolt
isolator
1/2” locknut
1/2” at washer
tank foot
isolator backing plate
isolator
1/2” oor stud
(provided by customer)
1/2” oor stud
(provided by customer)
tank foot
1/2” locknut
1/2” at washer
CAUTION !
Mounting
WARNING !
Fig. 3-18 Isolator Installation for
Unanchored or Anchored Receivers
Overload relays are designed to protect the motor from damage
due to motor overload. If the overload relay trips persistently, DO
NOT CONTINUE TO PUSH THE RESET BUTTON! Contact your local Quincy distributor for assistance.
The compressor unit must be removed from the shipping skid prior
to operation.
Proper mounting of QP series compressor units is
crucial to the safe operation and longevity of the
equipment. The installation requires a at and level
concrete oor or pad (for mobile units see Mount-
ing Mobile Units). Satisfactory results can usually
be obtained by mounting horizontal tank units on
vibration isolating pads available from your local
Quincy distributor. All vertical tank units must be
anchored! Refer to Fig. 3-8, Isolator Installation
for Unanchored or Anchored Receivers. Quincy
recommends that all vertical tank units be mounted
as indicated without isolators.
State or local codes may mandate that the compres-
sor be bolted to the oor. In this case the unit must be
leveled and bolted making absolutely certain the feet are not stressed in any
manner. Leave the locknut loose! Uneven feet drawn tightly to the concrete
pad will cause severe vibrations resulting in cracked welds or fatigue failure.
The customer is responsible for pro viding a suitable foundation & isolator
mounting where necessary.
Mounting Mobile Units
Gas engine driven compressors mounted to truck beds should be fas tened
in such a way so as not to create any stress to the air receiver tank. Truck
beds, characteristically, have a tendency to ex and could cause damage to
the receiver tank if the tank is fastened directly to the truck bed. It is the
user’s responsibility to provide an adequate means of fas tening the unit in
these applica tions.
Do not operate this compressor more than 15° off level or move it
CAUTION !
while it is operating.
System components
Efficiency and safety are the primary concerns when selecting compo nents
for compressed air systems. Products of inferior quality can not only hinder
performance of the unit, but could cause system failures that result in bodily
harm or even death. Select only top quality compo nents for your system. Call
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your local Quincy distributor for quality parts and professional advice.
Drive Pulleys / Sheaves
Various pulley and sheave combinations are available to obtain the de sired air
pressure and delivery rate of your compressor. Consideration must be given
Page 20
WARNING !
WARNING !
to these combinations to ensure that the motor is not over loaded by operating
above or below the designed speed range.
Whatever combination is employed, the drive pulleys & com pressor sheaves
must be properly aligned and drive belt tension set to specica tions (refer to
SECTION 5, Pulley / Sheave Alignment & Belt Tension). Improper pul-
ley/sheave alignment and belt ten sion can cause motor overloading, excessive
vibration, and prema ture belt and/or bearing failure.
Excessive compressor RPM’s (speed) could cause a pulley or sheave
to shatter. In an instant, the pulley or sheave could separate into
fragments capable of penetrating the belt guard and causing bodily
harm or death. Do not operate the compressor above the recommended RPM (refer to SECTION 2, Specifications).
Guards
All mechanical action or motion is hazardous in varying degrees and needs
to be guarded. Guards should be designed to achieve the required degree of
protection and still allow full air ow from the compressor sheave across the
unit. Guards shall be in compliance with OSHA safety and health standards
29 CFR 1910.219 in OSHA manual 2206 and any state or local codes.
Guards must be fastened in place before starting the compressor
and never removed before cutting off and locking out the main
power supply.
Check Valves
Check valves are designed to prevent back-ow of air pressure in the compressed air system (air ows freely in one direction only). The check valve must
be properly sized for air ow and tempera ture. Do not rely upon a check
valve to isolate a compressor from a pressurized tank or compressed
air delivery system during main tenance procedures!
Manual Shutoff Valves
Manual shutoff valves block the ow of air pressure in either direction. This
type of valve can be used to isolate a compressor from a pressurized system,
provided the system is equipped with a pressure relief valve ca pable of being
manually released. The pressure relief valve must be installed between the
manual shutoff valve and the compressor (refer to Fig. 3-9, Typical Drop
Leg & Component Location).
Pressure Relief Valves
Pressure relief valves aid in preventing system failures by relieving system
pressure when compressed air reaches a determined level. They are available
in various pressure settings to accommodate a range of applications. Pressure
relief valves are preset by the manufacturer and under no circumstances should
the setting be changed by anyone other than the manufacturer.
Pressure relief valves are designed to protect compressed air
DANGER !
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systems in accordance with ASME B19 safety standards. Failure to
provide properly sized pressure relief valves may cause property
damage, severe personal injury or even death.
Page 21
Pressure Switch
The pressure switch detects the demand for compressed air and allows the
motor to start. When the demand is satisfied, the unit stops. Pressure switches
provided by Quincy Compressor are pre-set at the factory and usually do not
require adjustment.
Induction System
Air Intake
A clean, cool and dry air supply is essential to the satisfactory operation of
your QP Series air compressor. The standard air filter that the com pressor is
equipped with when leaving the factory is of sufficient size and design to meet
normal conditions, when properly serviced, in ac cordance with the maintenance
section of this manual.
erable dust, dirt and other contaminants are prevalent, consult your local
Quincy distributor for advice and optional filters. A condensate trap must be
installed as close as possible to the inlet filter if, as a result of installation or
environmental conditions, there is any risk of moisture forming in the inlet
piping. It is the user’s responsibility to provide adequate filtration for those
conditions. Oil bath filters are not to be used. Warranty will be void if a failure
is determined to be caused by inadequate filtration.
If, however, the compressor is to be installed in a location where consid-
CAUTION !
Remote Inlet Filters
Depending on the size of the compressor and the size and construction of the
room in which the unit operates, the air inlet may have to be located outside
of the room. If it is necessary to remotely install the air filter, make the inlet
piping as short and direct as possible. Remotely in stalled air filters can lead
to vibrations in the inlet piping. These vibra tions can be minimized by adding
a pulsation dampener in the inlet piping between the remote inlet lter(s)
and the compressor.
If the inlet is routed to outside atmosphere, the inlet piping should be
equipped with a hooded air filter and designed to prevent condensate, water
or snow from being injested into the compressor.
All inlet piping should be at least the same size (or larger) in di ame ter
as the inlet connection to the compressor. For every 10 feet of inlet piping or
every 90° bend, increase the inlet piping diameter by one pipe size. The inlet
piping must be thoroughly clean inside. Remove all weld slag, rust or dirt.
Galvanized pipe with threaded or anged ttings is preferred.
Never locate the compressor air inlet system where toxic, volatile
or corrosive vapors, air temperatures exceeding 100°F, water, or
extremely dirty air could be ingested. These types of at mospheres
could adversely affect the performance of the compres sor system.
Compressed Air Discharge System
The discharge piping should be of the same diameter as the compressor
discharge connection, or sized so that the pressure drop at any point in the
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Page 22
system does not exceed 10% of the air receiver pressure. Install aux iliary air
receivers near heavy loads or at the far end of a long system. This will insure
sufficient pressure if the use is intermittent, or sudden large demands are
placed on the system.
Fig. 3-9 Typical Drop Leg & Component Location
Discharge piping should slope to a drop leg (refer to Fig. 3-19, Typical
Drop Leg & Component Location) or moisture trap to pro vide a collection
point where moisture can be easily removed. All service line outlets should be
installed above the moisture traps to prevent moisture from entering the tool
or device using the air. Manual shutoff valves, protected by pressure relief
valves, should be installed at all service line outlets to eliminate leakage while
the tools are not in use.
The discharge piping from the tank of a stationary unit must be equipped
with a properly rated exible connection. As with any piping, all parts of the
discharge piping should fit so as not to create any stress between the piping
and components.
Pneumatic Circuit Breakers or Velocity Fuses
The Occupational Safety and Health Act (OSHA), Section 1926.303, Paragraph
7, published in the Code of Federal Regulations 29 CFR 1920.1, revised July
1, 1982 states that all hoses exceeding 1/2” inside diameter shall have a safety
device at the source of supply or branch line to reduce pressure in case of a
hose failure”
These pneumatic safety devices are designed to prevent hoses from whip-
ping which could result in a serious or fatal accident.
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WARNING !
WARNING !
Never join pipes or fittings with lead-tin soldering or use plastic
pipe. Welded or threaded steel pipes and cast iron fittings, designed
for the pres sures and temperatures, are recommended.
Pressure Vessels
Air receiver tanks and other pressure containing vessels such as (but not
limited to) pulsation bottles, heat exchangers, moisture separators and traps,
must be in accordance with ASME Boiler and Pressure Vessel Code Section
VIII and ANSI B19.3 safety stan dards. They must be equipped with a properly
sized pressure relief valve, pressure gauge, tank drain, & manual shutoff valve
(refer to Fig. 3-9, Typical Drop Leg & Component Location).
Follow ASME code for air reciever tanks and other pressure containing vessels. Pressure vessels must not be modified, welded,
repaired, reworked or subjected to operating conditions outside
the nameplate ratings. Such actions will negate code status, affect
insurance status and may cause property damage, severe injury or
even death. Always replace worn, cracked or damaged tanks.
A drain valve must be located in the bottom of the air receiver to allow for
moisture drainage. An auto matic drain valve is recommended. Extend piping
away from the unit and any personnel in the immediate area to provide safe
and convenient removal of excess moisture.
CAUTION !
Fig. 3-10 Internal Drain Tube
If the air receiver is going to be subject to temperatures of 32°F or below,
provisions must be made to guard against freezing of the pressure relief valves,
check valves, pressure gauge, and moisture drain.
Condensation
Rust can form inside the crankcase and on internal com ponents as a result of
condensation. A compressor must operate long enough during each run cycle
to reach full operating temperature in order to reduce the risk of condensation.
Lubricant that appears milky on the dipstick may have mixed with
condensate. Failure to replace contaminated lubricant will result
in damage to the compressor and may void warranty.
Condensation can also form in the air tank of your
com pressor. When this happens, a mixture of air and
mois ture will be expelled through the service valve
and into what ever is connected to the valve (e.g. air
hoses, metal air lines, pneumatic tools, spray guns). An
in-line filter or dryer, available from your local Quincy
distributor, may be re quired to eliminate the moisture.
Condensation in the air tank can be kept to a mini mum
Pix 1224
by draining the tank on a daily basis. This also reduces
the risk of rust developing and weak ening the tank.
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WARNING !
Manual Tank Drain Valve Operation
The manual tank drain valve is located on the underside of the air tank. Some
tanks use an internal drain tube (Refer to Fig. 3-10, Internal Drain Tube)
to drain the moisture. Tank pressure is required to force moisture out of the
tank through the drain tube. Safe removal of tank moisture from the air tank
is dependent upon an internal tank pressure of no more than 30 PSIG. Higher
internal tank pressures are dangerous and could cause serious injury!
Oil and moisture residue must be drained from the air receiver
daily or after each use. Accumulations of oil residue in the receiver
can be ignited by embers of carbon created by the heat of compression, causing an explosion, damage to property and injury to personnel.
WARNING !
WARNING !
Fig. 3-11 Checking Pressure Relief Valves
& Relieving System Pressure
Do not open a manual tank drain valve on any air tank containing
more than 30 PSIG of air pressure!
Never attempt to relieve an air tank by removing a pipe plug or
any other system component!
Manually Draining An Air Tank:
Step 1) Disconnect & lockout the compressor from the
power source (electric models) or disconnect the spark
plug wire from the spark plug (gas engine models).
Step 2) Tanks subjected to freezing temperatures may
contain ice. Store the compressor in a heated area before
attempting to drain moisture from the tanks. Reduce
the air pressure in the tank to 30 PSIG by pulling the
pressure relief valve ring (refer to Fig. 3-11, Checking
Pressure Relief Valves & Relieving System Pressure).
Step 3) Slowly open the drain valve and allow the
moisture and air mixture to drain from the tank.
Pix 1160
Step 4) Once the moisture has been completely drained,
close the drain valve.
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Tank
Capacity
30 Gal. Horizontal .094 .106 Yearly 10 Years
30 Gal. Vertical .109 .111 Yearly 10 Years
60 Gal. Horizontal .109 .135 Yearly 10 Years
60 Gal. Vertical .109 .111 Yearly 10 Years
80 Gal. Horizontal .109 .135 Yearly 10 Years
80 Gal. Vertical .131 .133 Yearly 10 Years
120 Gal. Horizontal .131 .162 Yearly 10 Years
120 Gal. Vertical .163 .199 Yearly 10 Years
200 Gal. Horizontal .163 .199 Yearly 10 Years
240 Gal. Horizontal .163 .199 Yearly 10 Years
Horizontal
or
Vertical
Fig. 3-12 Recommended Air Tank Inspection Intervals
Minimum Allowable
Wall Thickness
Head Shell
Visually
Inspect
Hydrostatically
Inspect
Air Tank Inspection
Quincy Compressor recommends that all
air tanks be inspected at scheduled intervals. Refer to Fig. 3-12 Recommended
Air Tank Inspection Intervals for
relative information. Measure tank wall
thickness at several locations, including
the lowest point where condensation can
accumulate.
Refer to federal, state or provincial,
or local codes for mandatory air tank
maintenance information.
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SECTION 4 START-UP & OPERATION
Pre-starting Checklist
Never assume a compressor is safe to work on just because it is not
WARNING !
operating. It could restart at any time. Follow all safety precautions outlined in SECTION 5, Stopping For Maintenance.
WARNING !
Failure to perform the pre-starting checklist may result in mechanical failure, property damage, serious injury or even death.
Steps 1 through 12 should be performed prior to connecting the
unit to a power source. If any condition of the checklist is not satisfied,
make the necessary adjustments or corrections before starting the compressor.
Step 1) Remove all installation tools from the compressor and check for
installation debris.
Step 2) Unless otherwise specied, QP Series compressors are nor mally
shipped with break-in lubri cant in the crankcase. Check the
lubricant level in the crankcase. (Refer to SECTION 5, Lu-
brication for quantity and types of lubri cant to be used.)
Step 3) Check motor pulley and compressor sheaves for alignment and
tightness on shaft. (Refer to SECTION 5, Pulley / Sheave Align-
ment & Belt Tension.)
Step 4) Manually rotate the compressor sheave several rotations to be
sure there are no mechanical interferences.
Step 5) Check inlet piping installation (Refer to SECTION 3, Induction
System.)
Step 6) Check belt tension. (Refer to SECTION 5, Pulley / Sheave Align-
ment & Belt Tension.)
Step 7) Check all pressure connections for tightness.
Step 8) Make sure all pressure relief valves are correctly in stalled. (Refer
to SECTION 3, System Components.)
Step 9) Be sure all guards are in place and securely mounted. (Refer to
SECTION 3, System Components.)
Step 10) Check fuses, circuit breakers, and overload relays for proper size.
Verify that the supply voltage matches the motor requirements.
(Refer to SECTION 3, Electrical Supply Requirements.)
Step 11) Open all manual shutoff valves at and beyond the compres sor
discharge.
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Page 27
Step 12) After all the above conditions have been satisfied, the unit can be
connected to the proper power source.
Step 13) Jog the starter switch to check the rotational direction of the
compressor. It should agree with the rotation arrow em bossed on
the compressor sheave.
Step 14) Check for proper rotation of the cylinder cooling fan (ns inside
sheave). The fan should blow cooling air across the cylinder.
Initial Starting & Operating
This instruction manual, as well as any instructions supplied by manufacturers
of supporting equipment, should be read and un derstood prior to starting the
compressor. If there are any questions regarding any part of the instructions,
please call your local Quincy distributor, or the Quincy Compressor factory.
CAUTION !
Fig. 4-1
Oil Pressure Adjustment
When using battery cables to start engine driven units do not use
more than a total of 40 ft. of #4 gauge cable (GND & HOT).
With the pre-starting checklist completed and satisfied, start the com-
pressor. Watch and listen for excessive vibration and strange noises. If
OIL PRESSURE
ADJUSTMENT
SCREW
either exist, stop the compressor. Refer to SECTION 6, Troubleshooting
for help in determining the cause of such prob lems.
Oil pressure should be maintained at 18 to 20 PSIG after 20 minutes
of run time. Normally the oil pressure does not need to be adjusted. But
if it does, loosen the locknut on the adjustment screw located on the right
side of the oil pump housing (see Fig. 4-1, Oil Pressure Adjustment).
Increase the oil pressure by turning the adjustment screw clockwise; de-
crease the oil pressure by turn ing the adjusting screw counterclockwise.
Pix 1220
After adjustment tighten the locknut.
Check the air receiver pressure gauge or system pressure gauge for
proper readings. If inadequate or excessive air pressure conditions exist,
refer to Section 6 Troubleshooting.
Heat created during the initial startup of a new compressor will cause slight
expansion of the head(s). This slight expansion crushes the head gasket ever
so slightly and affects the torque value of the cylinder fasteners (capscrews).
To ensure optimal performance, Quincy recommends that you initially operate the compressor for at least one hour. Shut the compressor off and follow
precautions outlined in SECTION 5, Stopping for Maintenance. Retorque
the cylinder to head capscrews to the specifications outlined in the parts book
corresponding to the Record of Change for your compressor after the compressor has cooled.
Observe compressor operation closely for the first hour of opera tion and
then frequently for the next seven hours. After the rst eight hours, monitor
the compressor at least once every eight hours. If any abnormal conditions
are witnessed, stop the compressor and correct the problem. After two days of
operation check belt tension, lubricant level, and inspect the system for leaks.
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Page 28
Quincy Compressor recommends that a new or rebuilt reciprocating compres-
sor should be run for a total of 100 hours at full discharge operating pressure
to break-in the new piston rings. Until the rings are seated, the compressor
will discharge higher than normal amounts of lubricant. In light of this fact,
the lubricant level should be checked more frequently during the 100 hour
break-in period.
Daily Starting Checklist
Do not proceed until the Pre-starting Checklist and Initial Starting &
Operating sub-sections have been read and are thor oughly understood.
Step 1) Check lubricant level in crankcase.
Step 2) Drain liquid from the air receiver and moisture trap (if so equipped).
“MANUAL
UNLOAD”
position
“RUN”
position
Step 3) Check all hoses and fittings for weak or worn conditions and re-
Step 4) Jog the starter button and check compressor rotation (refer to
Note: Continuous Run Units - Prior to starting a continuous run
place if necessary.
Steps 14 & 15 of Pre-Starting Checklist).
unit, flip the toggle lever on the pilot valve stem to the “Manual
Unload” position (see Fig. 4-2). Now the compressor can be started
unloaded. Once the compressor is running at full speed, flip the
toggle lever back to the “RUN” position.
Fig. 4-2
Continuous Run
Pilot Valve
Step 5) Start compressor per factory instructions. (Refer to SECTION 4,
Pre-Starting Checklist and Initial Starting & Operating.)
Step 6) Check system pressure.
Step 7) Check all pressure relief valves for proper operation.
Step 8) Check control system for proper operation.
Step 9) Check the lubricant level in the crankcase several minutes after
the compressor has run. (Discoloration or a higher lubricant level
reading may indicate the presence of condensed liquids.) If lubri-
cant is contaminated, drain and replace.
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Page 29
SECTION 5
Stopping for Maintenance
WARNING !
MAINTENANCE & LUBRICATION
The following procedures should be followed when stopping the com pressor
for maintenance or service:
Step 1) Per OSHA regulation 1910.147: The Control of Hazardous Energy
Source (Lockout/Tagout), disconnect and lockout the main power
source. Display a sign in clear view at the main power switch stating that the compressor is being serviced.
Never assume a compressor is safe to work on just because it is not
operating. It could restart at any time.
Step 2) Isolate the compressor from the compressed air supply by closing
a manual shutoff valve upstream and downstream from the compressor. Display a sign in clear view at the shutoff valve stating
that the compressor is being serviced.
Step 3) Open a pressure relief valve within the pressurized system to al-
low it to be completely de-pressurized. NEVER remove a plug to
relieve the pressure!
Step 4) Open all manual drain valves within the area to be serviced.
Step 5) Wait for the unit to cool before starting to service. (Temperatures
Maintenance Schedule
To assure maximum performance and service life of your compres sor, a routine
maintenance schedule should be developed. Refer to t he backof this manual
for a maintenance procedures / intervals chart. Time frames may need to be
shortened in harsher environments. Keep this instruction manual readily
available near the compressor.
Every 8 Hours (or Daily)
•QP-5, QP-7.5 and QP-10 lubricant levels should be kept at the top of
the sight glass.
•Maintain lubricant levels of QP-15 models between high and low
level marks on dipstick. Check the lubricant level several minutes
after the compressor has run. (Discoloration or a higher lubricant level
reading may indicate the presence of condensed liquids.) If lubricant
is contaminated, drain and replace.
•Drain receiver tank, drop legs and traps in air distribution system.
Receiver tanks subjected to freezing temperatures may contain ice.
Store the compressor unit in a heated area before attempting to drain
moisture from the tank.
•Give compressor an overall visual inspection and be sure safety guards
are in place.
of 125°F can burn skin. Some surface tem pera tures exceed 350°F
when the compressor is operating.)
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Page 30
•Check for any unusual noise or vibration.
•Check for lubricant leaks.
•Check all pressurized components for rust, cracks or leaks. Immediately
discontinue use of the equipment and relieve all system pressure if
any of these problems are discovered. Do not use the equipment until
it has been inspected and repaired by a qualified mechanic.
Every 40 Hours (or Weekly)
•Manually operate the pressure relief valves to be certain they are
working.
•Clean the cooling surfaces of the intercooler, aftercooler and compressor.
•Check the compressor for air leaks.
•Check the compressed air distribution system for leaks.
•Inspect lubricant for contamination & change if necessary.
•Clean or replace the air intake lter. Check more often under humid
or dirty conditions.
After Initial 100 Hours
•Completely drain the crankcase of break-in lubricant and replace with
Quin-Cip-D or Quinc-Cip and new oil filter
Every 160 Hours (or Monthly)
•Check belt tension
Every 500 Hours (or Every 3 Months)
•When Quin-Cip lubricant is used, change lubricant every 500 hours
or every 3 months, whichever occurs rst (change more frequently in
harsher environments).
•Torque pulley clamp screws or jamnut.
DANGER !
Every 1000 Hours (or Every 6 Months)
•When Quin-Cip-D lubricant is used, lubricant change intervals may
be extended to every 1000 hours or every 6 months, whichever occurs
rst (change more frequently in harsher conditions).
•Retorque the cylinder to head capscrews (Refer to SECTION 4,
Torquing Cylinder to Head Capscrews).
•Inspect compressor valves for leakage and/or carbon build-up. If excessive sludge build-up exists inside the crankcase, clean the inside of the
crankcase as well as the screen. Never use a flammable or toxic
solvent for cleaning. Always use a safety solvent and follow
the directions provided.
Every 2000 Hours (or Every 12 Months)
•Inspect the pressure switch diaphragm and contacts. Inspect the
contact points in the motor / starter.
Servicing Reed Valves
QP Series compressor valve plates and reed valves should be inspected and
cleaned on a regular basis. The reed valves are made of stainless steel and can
be cleaned with a stiff bristle brush(not a wire brush!). A clean safety solvent
may also be used to loosen carbon deposits on the valve plates and reed valves.
Handle all parts with care; do not bend, mar or scratch any sealing surfaces.
Never use gasoline, thinners, or other flammable solutions to clean
valves or related parts.
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Page 31
Lubrication
QP Series basic compressors and units are normally shipped from the
factory with break-in lubricant in the crankcase. Before starting your
compressor, check the lubricant level in the crankcase. The lubricant level of
QT-5, QP-5, QP-7.5 and QP10 compressors must be kept
at the top of the sightglass.
The lubricant level of QP-15
compressors must register between the high and low marks
on the dipstick. Replace the
break-in lubricant after
100 hours of operation. In
order to qualify for the Ster-
Avg. # of Hrs.
Compressor
Operates Daily
4 13 days 25 days
6 9 days 17 days
8 6 days 13 days
10 5 days 10 days
# of Days of Operaton to
Reach:
50 Hrs. 100 Hrs.
ling Blue 7 year Warranty,
Quin-Cip-D must be used in the QP Pro and Max packages. The Sterling Blue
100 Hour Kit is shipped with QP Pro and Max packages.
Quin-Cip and Quin-Cip-D lubricants have proven under extensive testing
to min imize friction and wear, limit lubricant carryover, and reduce carbon
and varnish deposits. They will support the performance characteristics and
life designed into all Quincy compressors and are highly rec ommended. Refer
to the charts below to determine the correct amount of lubricant and viscosity
to use for your model and applica tion.
Approximate Crankcase Lubricant Capacities
Basic Compressor Model Lubricant Capacity
QP-5 & QP-7.5 1 qt. & 26 oz. (1.72 lit.)
QP-10 2 qts. & 22 oz. (2.54 lit.)
QP-15 3 qts. & 30 oz. (3.73 lit.)
Lubricant Specifications
Quin-Cip
Ambient Temperature SAE Viscosity ISO Viscosity
0-32° F SAE 10W ISO 32
32-80°F SAE 20W ISO 68
60-104°F SAE 30 ISO 100
Quin-Cip-D
Ambient Temperature SAE Viscosity ISO Viscosity
15-104°F SAE 30 ISO 100
The lubricant selected must have a pour point at least15°F lower
CAUTION !
than the minimum expected ambient temperature .
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Page 32
Lubricant Filter
When replacing the filter, apply a thin film of lubricant to the gasket surface
of the new filter prior to installing it onto the pump housing. Spin the filter
on the threaded stud until the gasket makes contact with the housing. Then
tighten the filter an additional 3/4 turn.
The filter provided with the compressor is for use with Quin-Cip or Qui-
Cip-D lubricant only.
A bent or damaged filter may rupture and leak. Do not use a filter
in this condition.
Pulley / Sheave Alignment & Belt Tension
Improper pulley/sheave alignment and belt tension are causes for mo tor
overloading, excessive vibration, and premature belt and/or bearing failure.
To prevent this from happening, check the pulley/sheave alignment and belt
tension on a regular basis (refer to SECTION 5, Maintenance Schedule).
Fig. 5-1
Setting Belt Tension
Pix 1152
Periodically inspect the motor pulley(s) and compressor sheave(s) for oil,
grease, nicks or burrs. Clean or replace if necessary. Make sure they are securely
fastened. Align the compressor sheave with the motor or engine pulley. Drive
belt grooves of the pulley(s) and sheave(s) should be in line with each other.
The compressor crankshaft must be parallel to the motor or engine drive shaft.
Belt tension should be measured and adjusted to provide smooth op eration.
Step-by-step procedures are provided here to correctly measure and set the
drive belt tension:
Step 1) Measure the span length of the drive. (Refer to Fig. 5-1, Setting
Belt Tension.)
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Page 33
Belt Motor Pulley Recommended
Cross Dia. Range Deflection Force (lbs.)
Section (inches) Minimum Maximum
B 4.6 4.0 5.9
B 5.0 - 5.4 4.5 6.7
B 5.6 - 6.4 5.0 7.4
B 6.8 - 9.4 5.8 8.6
Step 2) Determine the amount of deflection ( in inches) required to mea-
sure de flection force (in pounds) by multi plying the span length
x 1/
(.016) (i.e. 32” span length x 1/
64
[.016] = 1/2”[.50] of deflection
64
required to measure de flection force).
Step 3) Lay a straightedge across the top outer
surface of a drive belt from pulley to sheave.
POCKET CLIP
Step 4) At the center of the span, perpendicu-
lar to the belt, apply pressure to the outer surface
of the belt with a belt tension gauge (refer to Fig.
5-2, Belt Tension Gauge). Force the belt to the
predetermined deflection (refer to Step 2 above).
SLIDING
RUBBER O-RINGS
DEFLECTION
FORCE SCALE
(READ DOWN)
Record the reading on the belt tension gauge and
compare to the chart following Fig 5-1. The deflection force reading should be within the minimum and maximum values shown. Adjust belt(s)
accord ingly. New belts should be initially tensioned
to the maximum value plus 33% (multiply by 1.33).
DEFLECTION
DISTANCE
SCALE
(READ UP)
Fig. 5-2 Belt Tension Gauge
PRESSURE
ADJUSTMENT
SCREW
Fig. 5-3 Pressure Switch
ELECTRICAL
CONTACTS
Pix 1153
Pix 1067
Step 5) Recheck the tension of the new belts
several times in the first 50 hours of operation and
adjust if necessary. Thereafter, check belt tension
on a regular basis (refer to SECTION 5, Mainte-
nance Schedule).
Pressure Switch Adjustment
Pressure switches provided by Quincy Compressor
are pre-set at the factory and usu ally do not require
adjustment. However, the following procedures can
be performed by a qualified electrician to adjust
the pressure switch.
Step 1) Remove the pressure switch cover.
Step 2) While the compressor is running, screw
the spring loaded adjustment screw in (clockwise)
to increase the amount of air pressure required to
open the switch and stop the unit. Screw the spring
loaded adjustment screw out (counterclockwise)
to decrease the amount of air pressure required
to open the switch and stop the unit.
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Page 34
WARNING !
Electric power always exists inside the pressure switch whenever
the compressor package is connected to a power supply. Be careful not to touch any electrical leads when adjusting the pres sure
switch.
WARNING !
WARNING !
* Full load amps (FLA) & Service Factor can be found on the motor nameplate.
Never exceed the designed pressure for the system or overload the
motor beyond its Maximum Amp Draw.
* Full Load Amps x Service Factor = Maximum Amp Draw
Never assume a compressor is safe to work on just because it is not
operating. It may be in the automatic stand-by mode and may restart any time. Follow all safety precautions outlined in SECTION
5, Stopping For Maintenance.
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Page 35
PILOT VALVE ADJUSTMENTS
All adjustments made to the pilot valve must be performed by a qualified technician. The adjustments must
be made while the unit is operating, therefore, extreme caution must be taken while working on the unit.
Observe all necessary precautions. Always use a back-up wrench and make all differential and unload pressure adjustments in very small increments (1/8 turn).
WARNING !
The pressure switch and / or pilot valve are set at the factory for maximum efciency. Adjustments to either component must be performed by a qualied technician. Exceeding the factory recommended maximum pressure
will void the warranty and may cause personal injury.
Setting Unload Pressure
Step 1. Flip the toggle to
the “RUN” position
as shown, or turn
the knurled knob (if
so equipped) counterclockwise until it
stops.
*
Step 2.
Loosen locknut (coun-
terclockwise). * Sta-
bilize with backup wrench!
Setting Differential Pressure
Step 5. Loosen locknut (counterclock-
wise). * Stabilize with back-up
wrench!
“MANUAL
UNLOAD”
position
(Ref.)
Step 3. Turn clockwise to increase unload pres-
sure, turn counterclockwise to decrease
unload pressure. Hold position with
wrench and proceed to Step 4.
Step 4. Tighten locknut (clockwise) with wrench.
* Stabilize with back-up wrench!
Step 6. Turn clockwise to increase
the differential pressure and
counterclockwise to decrease
*
the differential pressure. Hold
position with wrench and proceed to Step 7.
Step 7. Tighten locknut (clockwise)
with wrench. * Stabilize with
back-up wrench!
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Page 36
SECTION 6 TROUBLESHOOTING
Trouble Probable Cause
Low discharge pressure •Restricted inlet
•Defective compressor valves or valve unloading mechanism
•Leaks in the compressed air distribution system at ttings, connections,
etc.
•Unloader pilot valve defective or set wrong
•Pressure switch defective or set wrong
•Drive belt slipping
•Incorrect speed
•Worn piston rings or loose piston
•Leaking head gasket
•Drain valve open
•Defective pressure gauge
•Pressure relief valve leaking
•Clogged intercooler
•Compressor incorrectly sized for the alti tude it is operating at
•Piston rings not seated; allow 100 hours at full pressure
Water in the crankcase •Compressor does not run long enough to get hot and vaporize the liquids
(lubricant appears milky) squeezed out of the air during compression (compressor may be too large
for application)
•Incorrect or inferior grade of lubricant
•System pressure leaking back through dis charge valve
Rusty valves •Compressor operated too infrequently
and/or cylin ders •Compressor does not run long enough to get hot and vaporize the liquids
squeezed out of the air during compression (compressor may be too large
for application)
•Compressor not properly prepared for stor age
•Discharge line from compressor head is pointed upward allowing con
densation to drain back at shutdown
Excessive vibration •Incorrect speed
•Compressor valves not functioning prop erly
•Loose pulley/sheave
•Compressor, motor or engine not secured tightly, or tightened into a
bind
•Foundation or frame inadequate
•Piping inadequately supported or tightened into a bind
•Excessive discharge pressure
•Compressor feet may need to be leveled with shims
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Page 37
Trouble Probable Cause
Excessive drive belt wear •Pulley/sheave out of alignment
•Belt too loose or too tight
•Belt slipping
•Pulley/sheave wobbling
•Pulley/sheave groove damaged or rough
•Incorrect belts
Low oil pressure •Oil sump strainer plugged
•Excessive leakage at crankshaft seals
•Low oil level
•Oil pump incorrectly assembled to the bear ing carrier (“o”ring not
properly located between oil pump body & bearing carrier)
•Oil pressure adjusting screw not set properly
•Defective oil pressure gauge
Compressor loads •Air receiver too small
and unloads excessively •Compressor valves or unloaders defective
•Excessive system leakage
•Compressor operating at incorrect speed
•Unloader pilot differential set too close
•Pressure switch defective
Defective pressure switch •Moisture &/or oil buildup on the pressure switch diaphragm
•Ruptured diaphragm
•Burned contact points
•Plugged air passage from the receiver to the pressure switch
•Loose electrical connection
Excessive air pressure •Air pressure gauge inaccurate
in air receiver •Leaks in unloader piping system
•Defective compressor head unloader
•Pilot valve or pressure switch set incor rectly or defective
•Pressure switch wired incorrectly
•Tube to compressor head unloader plugged
Excessive •Intercooler restricted or plugged
intercooler pressure •Compressor valves in second stage broken or not functioning properly
•Pilot valve or pressure switch set incor rectly or defective
QP Series Quincy Compressor
2022201802, July 2014 35 3501 Wismann Lane, Quincy Ill. - 62305-3116
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Trouble Probable Cause
Intercooler pressure •Compressor valves or head unloaders in rst stage not functioning
abnormally low properly or defective
•Restricted air inlet lter or suction line
•Pilot valve or pressure switch set incor rectly or defective
•Pressurized air at head unloader not vent ing properly when demand for
air is re quired
•Compressor valve or head gasket leaking
•Worn piston rings
•Leaking air at intercooler or intercooler connections
Compressor overheats •Clogged intake system
•Defective compressor valves
•Pressure setting too high
•Clogged intercooler, internally or exter nally
•Inadequate ventilation, or recirculation of hot air
•Pulley/sheave rotation wrong
•Incorrect speed
•Lubrication inadequate
•Compressor incorrectly sized
High discharge •Compressor valve assemblies defective
temperature •Discharge pressure too high
•Inadequate ventilation or hot air recirculat ing
•Cooling surfaces of compressor or inter cooler excessively dirty
•Ambient temperature too high
•Scored or excessively worn cylinder walls
Compressor knocks •Head clearance insufcient
•Piston loose in cylinder bore, cylinder bore worn, piston or piston rings
worn
•Worn rods or main bearing
•Wrong pressure setting, discharge pressure excessive
•Crankcase lubrication inadequate
•Loose pulley/sheave
QP Series Quincy Compressor
2022201802, July 2014 36 3501 Wismann Lane, Quincy Ill. - 62305-3116
Page 39
Trouble Probable Cause
Excessive oil consumption •Compressor runs unloaded too long
•Worn piston rings
•Restricted intake system
•Compressor running too hot
•Breather valve not functioning properly
•Oil level in crankcase too high
•Oil viscosity wrong for the application
•Connecting rod out of alignment, bent or twisted
•Leaking oil seal
•Piston rings not seated (allow 100 hours for seating)
•Wrong oil (may be a detergent oil with a tendency to foam)
•Inferior grade of oil
Excessive current draw •Low voltage (must be within 10% of name plate voltage)
(To determine maximum •Loose electrical connection
amper age allowed, multiply •Wire size too small
the FLA on the motor •Incorrect oil
nameplate by the service •Discharge pressure too high
factor.) •Intercooler plugging
CAUTION ! •Bearings tight or seizing
Motor surface temperature •No crankshaft endplay
normally exceeds 170° F. •Motor sized incorrectly
•Motor defective
•Drive belts too tight
Failure to start •Power not on
•Blown circuit fuse
•Overload relay tripped
•Low voltage
•Faulty start switch
•Power failure
•Pressure switch incorrectly
adjusted or faulty
•Loose or broken wire
•Motor defective
•Compressor seized
Motor stalls •Motor overloaded (refer to Excessive current draw)
Overload relays are designed to protect the motor from damage due to
motor overload. If the overload relay
trips persistently, DO NOT CONTINUE TO PUSH THE RESET BUTTON!
Contact your local Quincy distributor for assistance.
CAUTION !
QP Series Quincy Compressor
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Page 40
SECTION 7 REFERENCE INFORMATION
Decal Locations
Typical QP Series Unit with Horizontal Receiver
Typical QP Series Engine Driven Unit with Horizontal Receiver
QP Series Quincy Compressor
2022201802, July 2014 38 3501 Wismann Lane, Quincy Ill. - 62305-3116
Page 41
Typical QP Series Unit with Vertical Receiver
QP Series Quincy Compressor
2022201802, July 2014 39 3501 Wismann Lane, Quincy Ill. - 62305-3116
Page 42
QUINCY COMPRESSOR
STANDARD TERMS AND CONDITIONS
LEGAL EFFECT: Except as expressly otherwise agreed to in writing by
an authorized representative of Seller, the following terms and conditions
shall apply to and form a part of this order and any additional and/or different
terms of Buyer’s purchase order or other form of acceptance are rejected in
advance and shall not become a part of this order.
The rights of Buyer hereunder shall be neither assignable nor transferable
except with the written consent of Seller.
This order may not be canceled or altered except with the written consent
of Seller and upon terms which will indemnify Seller against all loss occasioned thereby. All additional costs incurred by Seller due to changes in
design or specications, modication of this order or revision of product
must be paid for by Buyer.
In addition to the rights and remedies conferred upon Seller by this order,
Seller shall have all rights and remedies conferred at law and in equity and
shall not be required to proceed with the performance of this order if Buyer
is in default in the performance of such order or of any other contract or
order with seller.
TERMS OF PAYMENT: Unless otherwise specied in the order acknowledgment, the terms of payment shall be 1% 15, net forty-ve (45) days after
shipment. These terms shall apply to partial as well as complete shipments.
If any proceeding be initiated by or against Buyer under any bankruptcy or
insolvency law, or in the judgment of Seller the nancial condition of Buyer,
at the time the equipment is ready for shipment, does not justify the terms of
payment specied, Seller reserves the right to require full payment in cash prior
to making shipment. If such payment is not received within fteen (15) days
after notication of readiness for shipment, Seller may cancel the order as to
any unshipped item and require payment of its reasonable cancellation charges.
If Buyer delays shipment, payments based on date of shipment shall become
due as of the date when ready for shipment. If Buyer delays completion of
manufacture, Seller may elect to require payment according to percentage of
completion. Equipment held for Buyer shall be at Buyer’s risk and storage
charges may be applied at the discretion of Seller.
Accounts past due shall bare interest at the highest rate lawful to contract for
but if there is no limit set by law, such interest shall be eighteen percent (18%).
Buyer shall pay all cost and expenses, including reasonable attorney’s fees,
incurred in collecting the same, and no claim, except claims within Seller’s
warranty of material or workmanship, as stated below, will be recognized unless
delivered in writing to Seller within thirty (30) days after date of shipment.
TAXES: All prices exclude present and future sales, use, occupation,
license, excise, and other taxes in respect of manufacture, sales or delivery,
all of which shall be paid by Buyer unless included in the purchase price at
the proper rate or a proper exemption certicate is furnished.
ACCEPTANCE: All offers to purchase, quotations and contracts of sales
are subject to nal acceptance by an authorized representative at Seller’s plant.
DELIVERY: Except as otherwise specied in this quotation, delivery will
be F. O. B. point of shipment. In the absence of exact shipping instruction,
Seller will use its discretion regarding best means of insured shipment. No
liability will be accepted by Seller for so doing. All transportation charges
are at Buyer’s expense. Time of delivery is an estimate only and is based
upon the receipt of all information and necessary approvals. The shipping
schedule shall not be construed to limit seller in making commitments for
materials or in fabricating articles under this order in accordance with Seller’s
normal and reasonable production schedules.
Seller shall in no event be liable for delays caused by res, acts of God,
strikes, labor difculties, acts of governmental or military authorities, delays
in transportation or procuring materials, or causes of any kind beyond Seller’s
control. No provision for liquidated damages for any cause shall apply under
this order. Buyer shall accept delivery within thirty (30) days after receipt of
notication of readiness for shipment. Claims for shortages will be deemed
to have been waived if not made in writing with ten (10) days after the receipt
of the material in respect of which any such shortage is claimed. Seller is
not responsible for loss or damage in transit after having received “In Good
Order” receipt from the carrier. All claims for loss or damage in transit should
be made to the carrier.
QP Series Quincy Compressor
2022201802, July 2014 40 3501 Wismann Lane, Quincy Ill. - 62305-3116
TITLE & LIEN RIGHTS: The equipment shall remain personal property,
regardless of how afxed to any realty or structure. Until the price (including
any notes given therefore) of the equipment has been fully paid in cash, Seller
shall, in the event of Buyer’s default, have the right to repossess such equipment.
PATENT INFRINGEMENT: If properly notied and given an opportunity
to do so with friendly assistance, Seller will defend Buyer and the ultimate user
of the equipment from any actual or alleged infringement of any published
United States patent by the equipment or any part thereof furnished pursu-
ant hereto (other than parts of special design, construction, or manufacture
specied by and originating with Buyer), and will pay all damages and costs
awarded by competent court in any suit thus defended or of which it may
have had notice and opportunity to defend as aforesaid.
STANDARD WARRANTY: Seller warrants that products of its own
manufacture will be free from defects in workmanship and materials under
normal use and service for the period specied in the product instruction
manual. Warranty for service parts will be Ninety (90) days from date of
factory shipment. Electric Motors, gasoline and diesel engines, electrical apparatus and all other accessories, components and parts not manufactured by
Seller are warranted only to the extent of the original manufacturer’s warranty.
Notice of the alleged defect must be given to the Seller, in writing with
all identifying details including serial number, type of equipment and date
of purchase within thirty (30) days of the discovery of the same during the
warranty period.
Seller’s sole obligation on this warranty shall be, at its option, to repair
or replace or refund the purchase price of any product or part thereof which
proves to be defective. If requested by Seller, such product or part thereof
must be promptly returned to seller, freight prepaid, for inspection.
Seller warrants repaired or replaced parts of its own manufacture against
defects in materials and workmanship under normal use and service for ninety
(90) days or for the remainder of the warranty on the product being repaired.
This warranty shall not apply and Seller shall not be responsible or liable for:
(a) Consequential, collateral or special losses or damages;
(b) Equipment conditions caused by fair wear and tear, abnormal condi-
tions of use, accident, neglect or misuse of equipment, improper storage or
damage resulting during shipping;
(c)Deviation from operating instructions, specications or other special
terms of sale;
(d) Labor charges, loss or damage resulting from improper operation,
maintenance or repairs made by person(s) other than Seller or Seller’s au-
thorized service station.
In no event shall Seller be liable for any claims whether arising from breach
of contract or warranty or claims of negligence or negligent manufacture in
excess of the purchase price.
THIS WARRANTY IS THE SOLE WARRANTY OF SELLERS AND
ANY OTHER WARRANTIES, WHETHER EXPRESS OR IMPLIED IN
LAW OR IMPLIED IN FACT, INCLUDING ANY WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR PARTICULAR USE ARE
HEREBY SPECIFICALLY EXCLUDED.
LIABILITY LIMITATIONS: Under no circumstances shall the Seller have
any liability for liquidated damages or for collateral, consequential or special
damages or for loss of prots, or for actual losses or for loss of production or
progress of construction, whether resulting from delays in delivery or performance, breach of warranty, negligent manufacture or otherwise.
ENVIRONMENTAL AND OSHA REQUIREMENTS: At the time of
shipment of the equipment from the factory, Quincy Compressor / Ortman
Fluid Power will comply with the various Federal, State and local laws and
regulations concerning occupational health and safety and pollution. However, in the installation and operation of the equipment and other matters
over which the seller has no control, the Seller assumes no responsibility for
compliance with those laws and regulations, whether by the way of indemnity,
warranty or otherwise.
June 30, 2003
Page 43
Suggested Weekly (40 hrs.) Intervals
MAINTENANCE SCHEDULE CHECKLIST
Suggested Monthly (160 hrs.) Intervals
Use this form to develop a routine maintenance schedule and record of performed maintenance. In the numbered columns enter the initials of the
person who performed the maintenance and the date. Enter additional maintenance procedures in the spaces provided in the left hand column as
needed per your application.
Equipment operating under humid or dirty conditions may require shorter intervals between scheduled maintenance.
The instruction manual provided with Quincy Compressor products, as well as any instructions supplied by manufacturers of supporting
equipment, should be read and understood prior to performing maintenance.
Maintenance Procedures 1 2 3 4 5 6 7 8 9 10 11 12
NOTE: Make your entries on a copy of this form. Retain this original form to make more copies in the future.
•manually test pressure relief valves
•
•clean surfaces of intercooler
•
•check distribution system for leaks
•
•check for contaminated lubricant *
•
•check for compressor/vacuum leaks
•
•
Maintenance Procedures 1 2 3
•check belt tension (if applicable)
•
•torque sheave fasteners (if applicable)
•
•change lubricant (& filter if applicable)*
•
*QRD Series excluded 50253-100
mnchklst.doc
Page 44
Reciprocating / Systems: 217.222.7700
Air Master 217.277.0270
E-mail: info@quincycompressor.com
Website: quincycompressor.com
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